Mitsubishi Electric PUHZ-W50VHA Technical Manual page 91

7 System example
1. Air to Water application
(1) Domestic Hot Water + Space heating by radiator
with packaged outdoor unit + FTC
*variable capacity request signals for Heat Pump is calculated by FTC.
1) System outline
Flow temp.
thermistor
2) Wiring / Switch setting
PAR-W21MAA
Remote Controller
Forced Comp. OFF →
HeatingECO
SW1
ON
1
System select
<Basic system>
•ON/OFF, operation mode by external
input.
•Set temp. by R/C.
Prohibition of cooling mode
OFF: permit
Fixed OFF
* DHW cylinder unit
Immersion
heater
* Time switch
FTC
*pump
Packaged
O/U
* Flow sensor
(to prevent
pipes from
freezing)
1
TB61
Flow temp.thermistor
2
3
4
5
6
1
TB62
2
3
4
5
6
TB142
2 4 6
1 3 5
At site FTC
(External Input)
1
2
3
4
5
6
Flow sensor
7
8
9
10
X11
11
→ 12
Hot Water → 13
X12
14
TB142
SW2
ON
2 3 4 5 6 7 8 1 2 3 4
Set temp. by DIP switch
(not in use in this case)
Set temp. range
Heating mode.
max 60:: O/U is packaged type.
Set temp. by DIP switch
OFF: by R/C or Analog signal
TH2(liquid pipe thermistor) connection
ON: not connect(packaged O/U)
*Radiator
Room thermostat:
installed in the coldest room
*valve
existing boiler
Gas boiler
for backup purpose
FTC board
SW1 SW2 SW3
1 1 1
8 8 8
OFF/ON OFF/ON OFF/ON
1
SW6
2
OFF/ON
TB141
8 10 12 14 2 4 6 8 10 12 14
7 9 11 13 1 3 5 7 9 11 13
(External Output)
X12
X11
DHW
SH
Time switch(AC230V Output)
Pump
Room Thermistor
(ON/OFF)
SW3
ON
1 2 3 4 5 6 7
5 6 7 8
Fixed: OFF FTC
Logic of forced comp OFF input
by external signal(TB142: 5-6)
OFF: short→comp OFF
ON: open→comp OFF
91
* TRV(Thermostatic Radiator Valve)
* locally supplied
CNS2
1 2
TO OUTDOOR UNIT
S1 S2 S3
TB6
L N
To metal chassis
Valve
(ON/OFF)
SW6
ON
8 1 2
Fixed OFF
Analog input setting
(not in use in this case)